Device Selection

Note, 1/14/2015: This page needs to be updated with new screenshots.

Newer versions of the River Trail extension enable the use of different OpenCL platforms and devices. In particular, this allows the user to run River Trail applications on a supported GPU.

A note of caution: We are providing this functionality as a means for others to explore the possibilities of River Trail on the GPU. River Trail is a prototype and not intended for production use. This is even more the case for River Trail's GPU support. In particular, note that malicious workloads may perform denial-of-service attacks on the GPU. Therefore, the extension should always be disabled when browsing the public web.

To change the platform and device that is used for execution, open the Add-ons manager in Firefox. On Windows, this leads to the below page:

Click the options button next to the River Trail extension (red box in the above image). This will open the below dialog box:

The upper half will show a list of all supported OpenCL platforms. Note that we currently only support Intel's and Apple's OpenCL SDK. The current platform is highlighted.

At the bottom (red box above), you can select the device to be used. In the above example, the CPU device (a 3rd generation Intel Core i7) and a GPU device (Intel HD Graphics 4000) are shown as the devices available. Selecting a device from this list enables River Trail parallel execution on that device.

Note that changes only take effect after corresponding websites have been reloaded.